containsErr method
Returns true
if the result is an Err
(failure) value
containing the given value.
Examples
Basic usage:
Result<int, String> x = Ok(2);
expect(x.containsErr('Some error message'), false);
Result<int, String> x = Err('Some error message');
expect(x.contains('Some error message'), true);
Result<int, String> x = Err('Some other error message');
expect(x.contains('Some error message'), false);
Implementation
@override
bool containsErr(Object? x) {
return false;
}